<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- 表格区域 -->
      <el-table :data="goodsList" border stripe>
        <el-table-column label="#" type="index"></el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="价格(元)" prop="goods_price" width="100px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="80px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="165px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.goods_id)"></el-button>
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
      <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[5, 10, 15, 20]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total" background>
      </el-pagination>
    </el-card>

    <!-- 编辑商品 的对话框 -->
    <el-dialog title="编辑商品" :visible.sync="editDialogVisible" width="50%" @close="editDialogCloesd">
      <el-form :model="editCateForm" :rules="editCateFormRules" ref="editCateFormRef" label-width="100px">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editCateForm.goods_name"  type="textarea"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="editCateForm.goods_price"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="editCateForm.goods_weight"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
          <el-input v-model="editCateForm.goods_number"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>

  </div>
</template>

<script>
export default {
  data() {
    return {
      queryInfo: { // 请求商品列表数据的 参数
        query: '', // 查询参数
        pagenum: 1, // 当前页码
        pagesize: 10 // 每页显示条数
      },
      goodsList: [], // 接收 获取来的商品列表数据
      total: 0, // 接收 获取来的总数据条数
      editDialogVisible: false, // 编辑商品对话框 的显示与隐藏
      editCateForm: {}, // 存储 根据ID获取到的当前行的数据
      editCateFormRules: { // 对话框中表单 的验证规则
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getGoodsList()
  },
  methods: {
    async getGoodsList() { // 请求商品列表数据
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      })
      if (res.meta.status !== 200) return this.$message.error('获取商品列表数据失败')
      this.$message.success('获取商品列表数据成功')
      // console.log(res.data)
      this.goodsList = res.data.goods
      this.total = res.data.total
    },
    // 每页显示多少条数据改变 的处理函数
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 当前页码值改变 的处理函数
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage
      this.getGoodsList()
    },
    // 点击操作中的“删除”按钮 根据 id 删除数据
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(value => value)
      if (confirmResult !== 'confirm') return this.$message.error('已取消删除')
      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) return this.$message.error('删除商品失败')
      this.$message.success('删除商品成功')
      this.getGoodsList()
    },
    // 点击“添加商品”按钮 跳转到另一组件
    goAddpage() {
      this.$router.push('/goods/add')
    },
    // 点击编辑按钮的 处理函数
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(`goods/${id}`)
      if (res.meta.status !== 200) return this.$message.error('获取商品信息失败')
      console.log(res.data)
      this.editCateForm = res.data
      this.editDialogVisible = true
    },
    // 修改参数对话框关闭时 表单内容重置
    editDialogCloesd() {
      this.$refs.editCateFormRef.resetFields()
    },
    // 点击 修改参数对话框的确定按钮 处理函数
    editParams() {
      this.$refs.editCateFormRef.validate(async value => {
        if (!value) return this.$message.error('表单验证失败')
        // 修改表单参数不成功 找不到问题
        const { data: res } = await this.$http.put(`goods/${this.editCateForm.goods_id}`, {
          goods_name: this.editCateForm.goods_name,
          goods_price: this.editCateForm.goods_price,
          goods_number: this.editCateForm.goods_number,
          goods_weight: this.editCateForm.goods_weight
        })
        if (res.meta.status !== 201) return this.$message.error('修改商品参数失败')
        this.$message.success('修改商品参数成功')
        this.getGoodsList()
        this.editDialogVisible = false
      })
    }
  }
}
</script>

<style>

</style>
